Technical notes for astrophotography gear and planninghttps://blog.gravity-astro.com/https://blog.gravity-astro.com/en/posts/filter-basics-for-urban-nebulae/https://blog.gravity-astro.com/en/posts/filter-basics-for-urban-nebulae/A practical guide to dual-band, narrowband, and UV/IR-cut filters for starting nebula imaging in light-polluted locations.Mon, 27 Apr 2026 00:00:00 GMThttps://blog.gravity-astro.com/en/posts/night-planning-checklist/https://blog.gravity-astro.com/en/posts/night-planning-checklist/A compact checklist for planning astrophotography sessions around moon position, astronomical twilight, target altitude, and field setup.Fri, 24 Apr 2026 00:00:00 GMThttps://blog.gravity-astro.com/en/posts/first-telescope-focal-length/https://blog.gravity-astro.com/en/posts/first-telescope-focal-length/For astrophotography, the first telescope should be chosen around target size, focal length, and tracking tolerance, not aperture alone.Mon, 20 Apr 2026 00:00:00 GMT